WO2002102094A1 - Intracall feature for access network - Google Patents
Intracall feature for access network Download PDFInfo
- Publication number
- WO2002102094A1 WO2002102094A1 PCT/IB2002/002004 IB0202004W WO02102094A1 WO 2002102094 A1 WO2002102094 A1 WO 2002102094A1 IB 0202004 W IB0202004 W IB 0202004W WO 02102094 A1 WO02102094 A1 WO 02102094A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- line carrier
- digital line
- local exchange
- transceivers
- coupled
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
- H04Q3/60—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to satellites or concentrators which connect one or more exchange lines with a group of local lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13003—Constructional details of switching devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13202—Network termination [NT]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13203—Exchange termination [ET]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13292—Time division multiplexing, TDM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13298—Local loop systems, access network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13381—Pair-gain system, digital loop carriers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13383—Hierarchy of switches, main and subexchange, e.g. satellite exchange
Definitions
- the present invention relates generally to the field of telecommunications and, in particular, to an intracall feature for an access network.
- Each access network usually includes a digital line carrier coupled to the local exchange by a plurality of high-speed digital lines, e.g., a Tl or an El line.
- a interface such as a V5.2 interface, defines the switching and signaling protocol between the digital line carrier and the local exchange.
- the access network provides for the connection of a number of transceivers, e.g., telephones, to the public switched telephone network (PTSN).
- PTSN public switched telephone network
- the first transceiver is taken off hook, and the number of the second transceiver is entered into the first transceiver.
- the number is transmitted to the local exchange via a digital line carrier of an access network.
- the local exchange initiates a call establishment process, e.g., a V5.2 call establishment process, to complete the call to the second transceiver.
- a call establishment process e.g., a V5.2 call establishment process
- each transceiver is associated with a different digital line carrier and access network.
- the call establishment process includes allocating a time slot to each of the first and second transceivers in the high-speed digital links between the digital line carrier and the local exchange.
- both transceivers are associated with the same digital line carrier.
- One problem with the above setup is that when the first and second transceivers belong to the same access network and are coupled to the same digital line carrier, the first and second transceivers connect through the local exchange. This increases the load on the digital high-speed lines between the digital line carrier and the local exchange and thus increases the required number of lines.
- Embodiments of the present invention free up bandwidth between a digital line carrier and the local exchange by allowing calls between transceivers of the same digital line carrier (hereinafter "Intracall") to connect through the digital line carrier.
- an access network adapted to be coupled to a local exchange over a high-speed link.
- the access network has a digital line carrier having a port adapted to be coupled to the high-speed link and a plurality of line cards. Each line card has at least one port adapted to be coupled to a transceiver.
- the digital line carrier selectively connects a transceiver associated with a port of one of the plurality of line cards of the digital line carrier with a transceiver associated with a port of another line card of the digital line carrier based on a signal sent to and returned by the local exchange.
- a method for connecting two transceivers coupled to a digital line carrier of an access network coupled to a local exchange involves connecting the two transceivers at the local exchange. Upon connecting the two transceivers at the local exchange a tone is transmitted from the digital line carrier to the local exchange. A tone is then received from the local exchange at the digital line carrier in response to the tone from the digital line carrier. Based on receiving the tone at the digital line carrier, the two transceivers are disconnected at the local exchange and are connected at the digital line carrier.
- Figure 1 is a block diagram of an embodiment of an access network according to the teachings of the present invention.
- Figure 2 is a flow diagram of an embodiment of a method for connecting two transceivers at a digital line carrier according to me teachings of the present invention.
- Figure 3 is a flow diagram of an embodiment of a method for disconnecting two transceivers at a digital line carrier according to the teachings of the present invention.
- Embodiments provide for connecting two transceivers belonging to the same access network and coupled to the same digital line carrier at the digital line carrier rather than at a local exchange that is coupled to the access network. This reduces the load on the local exchange and reduces the number of lines between the digital line carrier and the local exchange.
- Access network 100 includes digital line carrier 102 that is adapted to be coupled to a local exchange 110 over a high-speed link 112.
- high-speed link 112 comprises one or more high-speed digital lines, e.g., Tl/El lines.
- Access network 100 includes a central unit 114.
- Central unit 114 in one embodiment, is co-located at the local exchange. In other embodiments, central unit 114 is located separate from the local exchange.
- Central unit 114 has a port 114a adapted to be coupled to the local exchange and a port 114b that is coupled to highspeed link 112.
- Digital line carrier 102 has a network interface card 102a.
- Network interface card 102a has a port 108 adapted to be coupled to high-speed link 112.
- Digital line carrier 102 has line cards 102b]-102bN, e.g., ISDN cards, POTS cards, or the like.
- Line cards 102b ⁇ -102b N respectively have ports 102b ⁇ - 102b N .
- Each of ports 102bn-102b NN is adapted to be coupled to a transceiver.
- transceivers 104 and 106 are respectively coupled to ports 102bu and 102b 22 by lines 104a and 106a, as shown in Figure 1.
- one or more of line cards 102b ⁇ -102b N have multiple ports and transceivers, e.g., transceivers 104 and 106, are respectively coupled to one of the multiple ports of one of the line cards.
- transceivers 104 and 106 are telephones.
- switching and signaling between digital line carrier 102 and local exchange 110 is accomplished using a V5.2 protocol.
- Method 200 is one embodiment of a method of the present invention for connecting transceivers 104 and 106 at digital line carrier 102.
- Method 200 includes taking one of transceivers 104 and 106 off hook, e.g., transceiver 104 as depicted by arrow 202.
- Taking transceiver 104 off hook includes sending connection initiation information from transceiver 104 to local exchange 110, e.g., entering the number of the other of transceivers 104 and 106, e.g., transceiver 106.
- connection establishment process is initiated between local exchange 110 and digital line carrier 102, as depicted by arrow 204.
- the connection establishment process involves allocating time slots in high-speed link 112 to each of transceivers 104 and 106 at local exchange 110.
- the connection establishment process includes using a V5.2 protocol.
- transceiver 106 responds, for example, by ringing.
- transceiver 106 is taken off hook, e.g., answering the telephone, which connects transceiver 106 to local exchange 110, as depicted by arrow 206. This connects transceivers 104 and 106 at local exchange 110, as shown by arrow 210.
- local exchange 110 starts a billing process, as indicated by arrow 211, after transceiver 106 is connected to local exchange 110.
- digital line carrier 102 Upon connecting transceivers 104 and 106 at local exchange 110, digital line carrier 102 transmits a tone to local exchange 110, as indicated by arrow 212.
- Local exchange 110 subsequently transmits a tone back to digital line carrier 102, as indicated by arrow 214.
- digital line carrier 102 determines that this is an "Intracall," e.g., a call between two transceivers of the same digital line carrier.
- digital line carrier 102 connects transceivers 104 and 106 at digital line carrier 102, as shown by arrow 216.
- time slots are allocated to each of transceivers 104 and 106 at local exchange 110
- connecting transceivers 104 and 106 at digital line carrier 102 releases each of the allocated time slots, so these time slots can be used for other connections.
- digital line carrier 102 Upon connecting transceivers 104 and 106 at digital line carrier 102, digital line carrier 102 transmits a block signal to local exchange 110, as indicated by arrow 218.
- the block signal tells local exchange 110 to block incoming transmissions that are destined for transceivers 104 and 106.
- local exchange 110 disconnects transceivers 104 and 106 at the local exchange and blocks incoming transmissions that are destined for transceivers 104 and 106.
- Local exchange 110 subsequently transmits a block acknowledgement message to digital line carrier 102 acknowledging that incoming transmissions destined for transceivers 104 and 106 are blocked, as indicated by arrow 220.
- local exchange 110 terminates the billing process, as indicated by arrow 222, after digital line carrier 102 receives the block acknowledgement message.
- FIG. 3 is a flow diagram illustrating one embodiment of a method of the present invention for disconnecting transceivers 104 and 106 at digital line carrier 102.
- the method includes placing transceiver 104 on hook, e.g., hanging up the telephone, as depicted by arrow 302. This disconnects transceiver 104 from digital line carrier 102.
- digital line carrier 102 transmits an unblock signal to local exchange 110 that tells local exchange 110 to unblock incoming transmissions that are destined for transceiver 104, as indicated by arrow 304.
- Transceiver 106 is placed on hook, e.g., hanging up the telephone, as depicted by arrow 306. This disconnects transceiver 106 from digital line carrier 102.
- digital line carrier 102 transmits an unblock signal to local exchange 110 that tells local exchange 110 to unblock incoming transmissions that are destined for transceiver 106, as indicated by arrow 308.
- Embodiments of the present invention have been described.
- the embodiments provide an access network and a method for connecting two transceivers coupled to a digital line carrier of an access network coupled to a local exchange. These embodiments provide for connecting two transceivers belonging to the same access network and coupled to the same digital line carrier at the digital line carrier rather than at the local exchange, reducing the load on the local exchange and the number of lines between the digital line carrier and the local exchange.
- transceivers 104 and 106 can be interchanged in Figures 2 and 3 and in the corresponding discussion above.
- Figures 2 and 3 show that the transceiver that is taken off hook first, e.g., transceiver 104 in Figure 2, is placed on hook first, e.g., transceiver 104 in Figure 3.
- the transceiver that is taken off hook first is not limited to being placed on hook first. Rather, the respective transceivers can be placed on hook in any order.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL15928302A IL159283A0 (en) | 2001-06-11 | 2002-06-05 | Intracall feature for access network |
EP02735704A EP1402741A1 (en) | 2001-06-11 | 2002-06-05 | Intracall feature for an access network |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/878,500 | 2001-06-11 | ||
US09/878,500 US6970549B2 (en) | 2001-06-11 | 2001-06-11 | Intracall feature for access network |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002102094A1 true WO2002102094A1 (en) | 2002-12-19 |
Family
ID=25372155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2002/002004 WO2002102094A1 (en) | 2001-06-11 | 2002-06-05 | Intracall feature for access network |
Country Status (4)
Country | Link |
---|---|
US (1) | US6970549B2 (en) |
EP (1) | EP1402741A1 (en) |
IL (1) | IL159283A0 (en) |
WO (1) | WO2002102094A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5781623A (en) * | 1995-03-08 | 1998-07-14 | Alcatel N.V. | Method of controlling an access network as well as exchange and access network |
WO1998058502A1 (en) * | 1997-06-16 | 1998-12-23 | Telefonaktiebolaget Lm Ericsson | Control of communication traffic |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH118694A (en) * | 1997-06-18 | 1999-01-12 | Fujitsu Ltd | Exchange having virtual access network function and exchange system |
JPH11317970A (en) * | 1998-05-06 | 1999-11-16 | Fujitsu Ltd | Re-provisioning method in v5 interface and network system executing the same |
WO2001095599A1 (en) * | 2000-06-02 | 2001-12-13 | Fujitsu Limited | Communication device and access network device |
US7254228B2 (en) * | 2000-09-28 | 2007-08-07 | Eci Telecom Ltd. | Method and system for effective utilizing the switching capacity of local exchanges |
-
2001
- 2001-06-11 US US09/878,500 patent/US6970549B2/en not_active Expired - Fee Related
-
2002
- 2002-06-05 IL IL15928302A patent/IL159283A0/en unknown
- 2002-06-05 WO PCT/IB2002/002004 patent/WO2002102094A1/en not_active Application Discontinuation
- 2002-06-05 EP EP02735704A patent/EP1402741A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5781623A (en) * | 1995-03-08 | 1998-07-14 | Alcatel N.V. | Method of controlling an access network as well as exchange and access network |
WO1998058502A1 (en) * | 1997-06-16 | 1998-12-23 | Telefonaktiebolaget Lm Ericsson | Control of communication traffic |
Also Published As
Publication number | Publication date |
---|---|
EP1402741A1 (en) | 2004-03-31 |
IL159283A0 (en) | 2004-06-01 |
US20020186829A1 (en) | 2002-12-12 |
US6970549B2 (en) | 2005-11-29 |
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